71018 has 4 divisors (see below), whose sum is σ = 106530. Its totient is φ = 35508.

The previous prime is 71011. The next prime is 71023. The reversal of 71018 is 81017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69169 + 1849 = 263^2 + 43^2 .

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 70987 and 71005.

It is not an unprimeable number, because it can be changed into a prime (71011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17753 + ... + 17756.

2⁷¹⁰¹⁸ is an apocalyptic number.

71018 is a deficient number, since it is larger than the sum of its proper divisors (35512).

71018 is a wasteful number, since it uses less digits than its factorization.

71018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35511.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 71018 is about 266.4920261471. The cubic root of 71018 is about 41.4116764812.

Subtracting 71018 from its reverse (81017), we obtain a palindrome (9999).

The spelling of 71018 in words is "seventy-one thousand, eighteen".